Model Compression Ratio Calculator

Hamza Gujjar Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer Last updated: July 27, 2026

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Model Compression Ratio Calculator

Quantization, pruning, and knowledge distillation all trade off model size for accuracy - this calculator measures exactly how much size reduction a compression technique achieved.

Compression Ratio = Original Size / Compressed Size
Size Reduction% = (1 - Compressed/Original) x 100

Example

A 400 MB model compressed to 100 MB:

Compression Ratio = 400/100 = 4.0x (75% size reduction)

Three Common Compression Techniques

  • Quantization - reducing numerical precision, e.g. from 32-bit floating point weights down to 8-bit integers, typically achieving roughly 4x compression with minimal accuracy loss.
  • Pruning - removing less important weights or entire neurons/channels that contribute little to model output.
  • Knowledge distillation - training a smaller "student" model to mimic a larger "teacher" model's outputs.

Size Reduction Isn't the Whole Story

This calculator measures only the size reduction achieved, not the resulting accuracy impact - accuracy tradeoffs from any compression technique must be measured separately through actual evaluation on a held-out test set, since size reduction alone tells you nothing about whether the compressed model still performs acceptably well on real data.